.app_main {
    height: calc(100vh - 50px);
    overflow-y: scroll;
    width: calc(100vw - 30px);
    padding: 0 15px;
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    align-content: flex-start;
}

.app_mainTitle {
    width: 100%;
    font-size: 14px;
    font-weight: 400;
    color: #273240;
    line-height: 40px;
    text-indent: 12px;
}

.app_mainItem {
    width: calc(50% - 8px);
    height: 142px;
    border-radius: 8px;
    background: #000;
    margin: 4px;
    position: relative;
}

.app_mainItem video {
    width: 100%;
    height: 100%;
}

.app_mainItem .tips {
    text-indent: 12px;
    position: absolute;
    bottom: 12px;
    left: 0;
    font-size: 12px;
    font-weight: 400;
    color: #FDFDFD;
    line-height: 20px;
}

.popup-box video {
    width: 100%;
    height: 100%;
}

.popup-box {
    position: relative;
}

.popupIcon {
    position: absolute;
    top: 0;
    right: 0;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
}